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Asked: 2026-06-09T21:03:55+00:00

I have a sql query to obtainrecords for a date range. My query works

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I have a sql query to obtainrecords for a date range. My query works find byut when I analyzed data, I found that the records are retirved base don GMT timezone value, thus making the restults incorrect.

I get my time from a unix epoch value in database.

SELECT tableA.columnA,tableB.columnB 
FROM tableA INNER JOIN tableB ON  tableA.aId = tableB.aId 
WHERE (to_date('1970-01-01 00:00:00 +10:00','yyyy-MM-dd hh24:mi:ss') +    (tableB.epochValue/60/60/24/1000)) >  to_date('--FROM_DATE--', 'yyyy-MM-dd hh24:mi:ss') 
AND (to_date('1970-01-01 00:00:00 +10:00','yyyy-MM-dd hh24:mi:ss') + (tableB.epochValue/60/60/24/1000)) <= to_date('--TO_DATE--', 'yyyy-MM-dd hh24:mi:ss');

I want to obtain the records based on my timezone which is GMT+10 but this script gets data based on GMT timezone.
I was wondering how to pass my timezone to obtain the correct date object

using http://www.epochconverter.com/, I obtained these values
my epoch value – 1345079730
GMT: Thu, 16 Aug 2012 01:15:30 GMT
Your time zone: Thu Aug 16 2012 11:15:30 GMT+10

My database is – Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 – 64bit

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1 Answer

  1. Editorial Team

    Found the answer to my question.

    apparently, you need to consider the time zone settings when you calculate epoch value as well

    1. add 10 hours (10*60*60*1000 milliseconds) to epoch value – epoch current value is in GMT so to make it EST (GMT+10), I added this.

    2. Used TO_TIMESTAMP_TZ instead of to_date

      SELECT tableA.columnA,tableB.columnB 
FROM tableA INNER JOIN tableB ON  tableA.aId = tableB.aId 
WHERE (TO_TIMESTAMP_TZ('1970-01-01 00:00:00 +10:00','yyyy-MM-dd hh24:mi:ss TZH:TZM') +    ((tableB.epochValue+(10*60*60*1000))/60/60/24/1000)) >  to_date('##FROM_DATE## +10:00', 'yyyy-MM-dd hh24:mi:ss TZH:TZM') 
AND (TO_TIMESTAMP_TZ('1970-01-01 00:00:00 +10:00','yyyy-MM-dd hh24:mi:ss TZH:TZM') + ((tableB.epochValue+(10*60*60*1000))/60/60/24/1000)) <= to_date('##TO_DATE## +10:00', 'yyyy-MM-dd hh24:mi:ss TZH:TZM');
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